CODEWITHSUNDEEP
javascriptcsshtml
Benny
Benny

Reputation: 531

Fullscreen option

I am trying to provide full screen option in my web-page when the user presses "Space" and "Enter" keys simultaneously. I have the following code. I have the following code. But it is not working. Where am I going wrong? It is working if I give a single key. 

<!doctype html>
<html>
<head>
  <title>Full Screen Example</title>
  <style type="text/css">
      :-webkit-full-screen #myimage {
      width: 100%;
      height: 100%;
    }
  </style>
</head>
<body>
  <p>Press "space" and "enter" to enter full screen</p>
  <p><strong>To use full-screen mode, you need Firefox 9 or later or Chrome 15 or         later.</strong></p>
  <img src = "./3.jpg" width="640" height="360" id="myimage">
</body>
<script>
var imageElement = document.getElementById("myimage");

function toggleFullScreen() {
    if (!document.mozFullScreen && !document.webkitFullScreen) {
        if (imageElement.mozRequestFullScreen) {
            imageElement.mozRequestFullScreen();
        } else {
            imageElement.webkitRequestFullScreen(Element.ALLOW_KEYBOARD_INPUT);
        }
    } else {
        if (document.mozCancelFullScreen) {
            document.mozCancelFullScreen();
        } else {
            document.webkitCancelFullScreen();
        }
    }
}

document.addEventListener("keydown", function(e) {
    if ((e.keyCode == 13) && (e.keyCode == 32)) {
        toggleFullScreen();
    }
}, false);
</script>

Upvotes: 1

Views: 140

Answers (2)

Jackson Ray Hamilton
Jackson Ray Hamilton

Reputation: 9466

Remove your current addEventListener() call and augment your script with what I've provided below. Note that this won't work in IE8 (but considering you're using moz and webkit functions I imagine you aren't targeting it anyway).

var keys = [];

function keyIsDown(keyCode) {
  return (keys.indexOf(keyCode) > -1);
}

document.addEventListener("keydown", function(e) {
  // Remember the key being pressed
  keys.push(e.keyCode);

  // Check if ENTER and SPACE are both being pressed
  if (keyIsDown(13) && keyIsDown(32)) {
    toggleFullScreen();
  }
}, false);

document.addEventListener("keyup", function(e) {
  // Remember that this key is no longer being pressed
  var keyIndex = keys.indexOf(e.keyCode);
  if (keyIndex > -1) keys.splice(keyIndex, 1);
}, false);

Credit to parjun for the basic idea; I just worked this out without jQuery.

Upvotes: 1

parjun
parjun

Reputation: 130

You need to maintain an array of the keys being pressed and the keys being released. 

var keyArray = [];
function containsAll(firstArray, secondArray){ 
  for(var i = 0 , len = firstArray.length; i < len; i++){
     if($.inArray(firstArray[i], secondArray) == -1) return false;
  }
  return true;
}
document.addEventListener("keydown", function(e) {
      if ((e.keyCode == 13) || (e.keyCode == 32)) {
       keyArray.push(e.keyCode);
      }
    if(containsAll(['13','32'],keyArray)){
toggleFullScreen();
}

  }, false);
$(document).keyup(function (e) {
    keyArray.remove(e.keyCode);
});

Upvotes: 0

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